﻿AQUATIC 
  INSECTS 
  IN 
  THE 
  ADIRONDACKS 
  593 
  

  

  PLATE 
  16 
  

  

  Hexagenia 
  variabilis 
  Eaton 
  

  

  Fig. 
  

  

  1 
  Female 
  imago, 
  natural 
  size. 
  Photo 
  from 
  life 
  by 
  J. 
  G. 
  Needham 
  

  

  2 
  Dorsal 
  view 
  of 
  the 
  head 
  of 
  the 
  iiyniph 
  

  

  3, 
  "Fore 
  and 
  ^hind 
  feet 
  of 
  the 
  nymph 
  ; 
  /femur 
  ; 
  ^tibia 
  

  

  PLATE 
  17 
  

  

  Dragonflies 
  

  

  Fig. 
  

   lAeschna 
  constricta 
  Say 
  

   2 
  Gomphus 
  scudderi 
  Selys 
  

  

  Natural 
  size: 
  photos 
  from 
  life 
  by 
  J. 
  G. 
  Needham 
  

  

  PLATE 
  18 
  

  

  Dragonfly 
  nymphs: 
  photos 
  by 
  J. 
  G. 
  Needham 
  

   Fig. 
  , 
  

  

  1 
  Dromogomphus 
  spinosus 
  Selys 
  

  

  2 
  Gomphus 
  scudderi 
  Selys 
  

  

  3 
  G. 
  brevis 
  Selys 
  

   4G. 
  spicatus 
  Selys 
  

  

  5 
  Ophiogomphus 
  aspersus 
  Morse 
  

   GLanthus 
  parvulus 
  Selys 
  

   7 
  Hagenius 
  brevistylus 
  Selys 
  

   SDidymops 
  transversa 
  Say 
  

   Fig. 
  1 
  to 
  7 
  are 
  from 
  cast 
  skins. 
  

  

  PLATE 
  19 
  

  

  Eggs 
  of 
  nine 
  genera 
  of 
  dragonflies 
  (Odonata-Anisoptera) 
  

   Fig. 
  

  

  1 
  Egg 
  of 
  Anax 
  Junius 
  Dru: 
  the 
  line 
  k-k 
  indicates 
  the 
  depth 
  of 
  its 
  inser- 
  

  

  tion 
  into 
  cat-tail 
  (T 
  y 
  p 
  h 
  a 
  ) 
  stems. 
  

  

  2 
  Egg 
  of 
  Hagenius 
  brevistylus 
  Selys 
  

  

  3 
  Egg 
  of 
  Gomphus 
  descriptus 
  Banks 
  var. 
  b 
  o 
  r 
  e 
  a 
  1 
  i 
  s 
  Ndm. 
  

  

  4 
  Egg 
  of 
  Cordulia 
  Shurtleffi 
  Scudd. 
  

  

  5 
  Egg 
  of 
  Plathemis 
  lydia 
  

  

  6 
  Egg 
  of 
  Leucorhinia 
  glacialis 
  Hagen 
  

  

  7 
  Egg 
  of 
  Celithemis 
  eponina 
  Dru. 
  

  

  8 
  Egg 
  of 
  Perithemis 
  domitia 
  Dru. 
  

  

  9 
  Egg 
  of 
  Tramea 
  lacerata 
  Hagen 
  

  

  Gelatinous 
  envelops 
  (g) 
  are 
  indicated 
  for 
  all 
  the 
  figures 
  except 
  1 
  and 
  8: 
  

   all 
  are 
  magnified 
  about 
  50 
  diameters. 
  

  

  PLATE 
  20 
  

  

  Gomphinae 
  

  

  Fig. 
  

   1-4 
  Occiput 
  of 
  the 
  female 
  of 
  Ophiogomphus 
  carolus 
  Ndm., 
  seen 
  

  

  from 
  the 
  front, 
  showing 
  variations 
  in 
  occipital 
  spines 
  

   5 
  Genital 
  hamules 
  of 
  O. 
  johannus 
  Ndm., 
  from 
  the 
  left 
  side, 
  inverted 
  

  

  